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Choi, Sun-Mi,Choi, Ji-Hun,Choi, Yun-Sang,Kim, Hyun-Wook,Kim, Hack-Youn,Lee, Mi-Ai,Hwang, Ko-Eun,Lee, Ju-Woon,Kim, Cheon-Jei Korean Society for Food Science of Animal Resource 2011 한국축산식품학회지 Vol.31 No.5
In this study, the effects of kimchi powder on the quality properties of an emulsion type sausage made with irradiated pork meat were investigated. Raw ground pork ham was gamma-irradiated at 5 and 10 kGy, and the emulsion type sausage was then manufactured with the irradiated pork meat. The pH value was shown to increase by irradiation of raw material (p<0.05). Samples containing kimchi powder had a lower pH value than other treatments, but no significant differences were observed. In a sensory evaluation, the scores of all the criteria were decreased with an increased irradiation dose of raw material, but samples containing kimchi powder had a higher sensory score than other treatments in all irradiation doses of raw material. The TBARS values were increased by irradiation of raw material and the samples containing kimchi powder had the highest value (p<0.05). Odor substances analyzed by an electronic nose were increased with increased irradiation dose of raw material in all treatments, and samples containing kimchi powder showed a higher increase of odor substances than other treatments. Thus, this study demonstrated that kimchi powder was effective in eliminating the off-odor and flavor of sausages made with irradiated pork meat despite the increase of the TBARS value.
Histopathologic Features of Alopecia Areata: A Pathologic Approach to Prognosis
( Sang-myung Park ),( Joong-woon Choi ),( Bark-lynn Lew ),( Woo-young Sim ) 대한피부과학회 2020 大韓皮膚科學會誌 Vol.58 No.1
Background: Although alopecia areata (AA) is usually diagnosed based on the patient’s clinical manifestations, histologic features are the key to establishing the correct diagnosis. Moreover, it is possible to know about the progression of AA through understanding the various histologic characteristics of AA. Many studies have reported a lot of literatures related to AA, but studies investigating the correlation between histologic features and prognosis have not yet been reported. Objective: This study aimed to establish the histologic features of AA in scalp biopsy specimens and sought to correlate between histopathologic features and clinical prognosis. Methods: The pathology archives of Kyung Hee University Hospital at Gang-dong were searched for AA in the diagnostic field from the period of 2006 to 2016. The biopsy specimens were sectioned by Tyler technique. A total of 464 patients were included in the analysis. Results: There were reduction of anagen hair count according to the severity of AA, and a higher percentage of telogen ratio and vellus hair counts were observed in the alopecia totalis and alopecia universalis. Total hair counts (9.9) including miniaturized hairs were decreased prominently at more than 5 years of current duration. There was a high ratio of peribulge lymphocytic infiltration (45%) in patients with ophiasis and acute diffuse type and those with total alopecia showed prominent small portions of follicular miniaturization (27%). Conclusion: These histopathologic features mentioned above may shed light on the understanding of disease progression of AA, which have various clinical aspects. Using these histologic features, we will be able to predict the efficacy for therapy and prognosis of AA. (Korean J Dermatol 2020;58(1):26∼32)
Woon-Ha Hwang,Jung-Sung Back,Sung-Hyun An,Jae-Heok Jeong,Han-Yong Jeong,Hyen-Seok Lee,Jong-Tak Yun,Gun-Hwi Lee,Kyung-Jin Choi 한국국제농업개발학회 2016 韓國國際農業開發學會誌 Vol.28 No.4
We investigate the change of leaf chlorophyll content according to iron content in brown rice when cultivated on the iron limited solid MS medium. By cultivating wild-type and transgenic brown rice in a solid MS medium, we confirmed that iron deficiency chlorosis did not occur in MS media which were contained over 20% of iron content compared to normal MS condition. After selecting twenty kinds of Korean rice varieties, those brown rice were cultivated in solid MS media which were contained from 0 to 15% of iron content compared to normal MS condition then the leaf chlorophyll content was measured. The leaf chlorophyll content was changed according to iron content in brown rice when cultivated in solid MS medium which was contained 0 and 5% of iron content,. There was a strong correlation between iron content in brown rice and leaf chlorophyll content cultivated in solid MS medium with 5% of Fe content. Therefore we expect that analysis of leaf chlorophyll content after cultivated on MS medium with 5% iron content compared to normal MS media condition will be more simple and effective method to screening high iron content brown rice without measurement of iron content.
Choi, Wahn Soo,Seo, Dong Wan,Chang, Man Sik,Han, Jeung Whan,Hong, Sung Youl,Paik, Woon Ki,Lee, Hyang Woo 성균관대학교 약학연구소 1998 成均藥硏論文集 Vol.10 No.1
The presence of L-arginine methylester (AME), L-arginine ethylester (AEE), or N-nitro-L-arginine methylester (NAME) in the growth media of Staphylococcus aureus increased the nitric oxide synthase (NOS) activity approximately 5-to 14-fold. The increase of NOS activity was confirmed by two assay methods, namely assaying the formation of L-[^3H] citrulline from L-[^3H] arginine and NO formation. The increase of NOS activity was most likely due to increased de novo synthesis, demonstrated by Western immunoblot analysis. The addition of methanol to the culture medium also increased the NOS activity as much as that found with the above three compounds. Evidence is presented to show that AME, AEE, or NAME gave rise to the formation of methanol in vivo by the action of intracellular esterase(s) and that methanol is subsequently involved in the induction of NOS in this bacterial system.
Choi, Sung-Ran,Kang, Min-Jung,Park, Gyu-Hwan,Kim, Da-Hye,Jeong, Da-Woon,Seo, Eun-Hye,Lee, Hyang-Min,Park, Hyun-Kyung,Jeong, Jin-Yee,Lee, Jung-Min,Jeong, Soo-Young,Lee, Jun-Young,Cho, Eun-Jin,Jekal, Su 대한임상검사과학회 2013 대한임상검사과학회지(KJCLS) Vol.45 No.2
Recently, the isolation rate of nontuberculous mycobacteria (NTM) in clinical laboratories and the incidence of NTM infections are on the increase in Korea, but there have been only a few studies that reveal the general aspect of NTM isolation or species distribution. Therefore, this study was performed to examine the species identification by PCR-restriction fragment length polymorphism analysis (PRA, PCR-RFLP), and the clinical significance of mycobacterial cultures. PRA was used during the novel region of the rpoB gene and was developed for rapid and precise identification of mycobacteria to the species level. From January 2012 to April 2012, we examined pre-identified nontuberculous mycobacteria (60 species in 3 hospital of Busan-Kyeongnam area). We confirmed 4 (6.6%) Mycobacterium tuberculosis (MTB) and 56 (93.4%) NTM from 60 pre-identified NTM species by multiplex PCR (MolecuTech $MTB-ID^R$ V3, YD Diagnostics, Korea) and PRA (Myco-ID, YD Diagnostics, Korea). The distribution of 56 NTM species were M. intracellulare type I 15 (26.7%), M. avium 14 (25%), M. abscessus 11 (19.5%), M. kansasii type I 3 (5.4%), M. pulveris 2 (3.6%), M. intracellulare type, M. chelonae, M. kansasii type V, M. gallinarum, M. wolinskyi. Respectively, 1 (1.8%) and 6 (10.7%) species were not identified.
Waterborne Pathogens Identification in Public Bathroom by PCR-Reverse Blot Hybridization Assay
Choi, Seung-Gu,Song, Woon-Heung,Lee, Jae-Sang,Yang, Byoung-Seon,Choi, Myeong-Sik 대한임상검사과학회 2011 대한임상검사과학회지(KJCLS) Vol.43 No.3
A total of 30 water samples were collected from 30 different public baths in Seoul, Korea. Contamination of public bath water by waterborne pathogens can cause disease outbreaks and contribute to increase background rates of disease. Pathogens in water was filtered by nitrocellulose membrane with $0.45{\mu}m$ pore size. The membrane filters were analyzed by both cultivation and polymerase chain reaction (PCR) amplification of partial 16S rRNA gene. Various microorganisms including 4 Escherichia coli/Shigella spp. 1 Salmonella spp. 3 Pseudomonas aeruginosa and 2 Mycobacterium spp. were identified by reverse blot hybridization assay (REBA). PCR-REBA was able to identify many bacterial genera in one assay. Our results suggest that appropriate hygiene practice and continuous monitoring is needed for reducing health risk associated with public bath houses.